ABB REM545BG227AAAB Generator & Motor Protection IED

ABB REM545BG227AAAB Technical Specification
1. Basic Product Information
Brand: ABB Oy Distribution Automation
Model: REM545BG227AAAB
Order Part Number: REM545BG227AAAB
Product Name: REM545 Multi-Functional Machine Terminal / Generator & Motor Protection IED
Country of Origin: Vaasa, Finland
HS Customs Code: 8538909100 (Medium voltage machine protection relay intelligent electronic device)
2. Product Overview
This hardware variant BG227AAAB is equipped with 9-channel analog sensor inputs, 7 groups of CT 1/5A current measurement loops, wide-range DC auxiliary power supply and complete digital I/O expansion. It integrates comprehensive rotating machine protection algorithms including differential protection, overload, unbalanced current, overvoltage/undervoltage, over/under frequency, stall, thermal protection, earth fault and generator motoring protection.

Built-in programmable logic control (PLC function), 4-channel isolated 0–20mA analog output, 25 binary inputs and 18 configurable relay outputs, supporting LON, SPA, Modbus serial communication and optional IEC 61850 via external SPA-ZC 400 adapter . The front LCD display supports local parameter setting, fault recording and real-time data viewing, with 8 configurable alarm LED indicators.
It adopts three-proof conformal coated PCB, meets IEC, CE, cULus and marine classification standards, widely applied in hydropower, thermal power, diesel generator sets, mining large motors, marine power propulsion equipment and industrial medium-voltage pump/fan control rooms. This model has been discontinued for new production and only supplied as maintenance spare parts .
3. Mechanical Dimensions & Weight
Overall Dimension (H × W × D): 263 mm × 238 mm × 310 mm
Net Weight of Single Unit: 8.13 kg
Gross Weight with Original Wooden Anti-collision Packaging: 9.25 kg
Installation Mode: Standard 19-inch cabinet flush panel mounting
Housing Material: Cold rolled steel enclosure with anti-corrosion coating
Protection Class: IP20 (indoor control cabinet only)
Rear Terminal Spec: Screw terminal blocks, max wire cross-section 6 mm²
4. Electrical Input Parameters
Auxiliary Power Input
AC Auxiliary Supply: 90–264 VAC, 50/60 Hz
DC Auxiliary Supply: 110–220 VDC; optional 24–60 VDC wide DC version
Typical Power Consumption: 22 VA
Measuring Transformer Input
1. Voltage PT Input: Un = 100–120 V secondary voltage
2. CT Current Input: In = 1 A / 5 A dual range support
3. RTD/Analog Sensor Input: 9 galvanically isolated analog channels (0–20mA, 0–10V, Pt100 RTD)
Digital Binary Inputs
Total Binary Input Channels: 25 channels
Threshold Voltage: 80 VDC high threshold, 18 VDC low threshold optional
Input Isolation: 1500 VAC optocoupler isolation per channel
Communication Input Interfaces
1. RS232 local service port (X3.2 rear connector)
2. LON optical fiber communication input
3. SPA / RS485 Modbus bus input
Environmental Operating Range
Operating Temperature: -20°C ~ +70°C
Storage Temperature: -40°C ~ +85°C
Relative Humidity: 5%–95% RH, non-condensing
Vibration & Salt Spray: Compliant with marine EMC and IACS standards
5. Electrical Output Parameters
Relay Digital Outputs
Total Relay Outputs: 18 configurable relays
High-speed double-pole trip relays: 5 groups (for